Biodegradable polymer material compatibilized and blended by lignocellulose and preparation method thereof

A technology for lignocellulose and polymer materials, which is applied in the field of lignocellulose compatibilizing blending and degrading polymer materials and its preparation, can solve the problems of poor mechanical properties, poor compatibility of biological blending materials, etc. Capacitance improvement, boost effect, dosage reduction effect

Inactive Publication Date: 2011-11-23
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of poor compatibility and poor mechanical properties of bio-blended materials in the prior art, the present invention proposes a lignocellulose compatibilized blended degradable polymer material and its preparation method, by using a Macromolecular compatibilizers to effectively improve the rheological and mechanical properties of composites

Method used

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  • Biodegradable polymer material compatibilized and blended by lignocellulose and preparation method thereof
  • Biodegradable polymer material compatibilized and blended by lignocellulose and preparation method thereof
  • Biodegradable polymer material compatibilized and blended by lignocellulose and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of preparation method of macromolecule compatibilizer polycaprolactone-maleic anhydride block copolymer: place 250ml there-necked flask with strictly dried maleic anhydride 15 g and ε-caprolactone 70 g, then decompress , Tong N 2 , repeat the operation 3 times, stir under the protection of nitrogen, heat the oil bath to 130 ° C, until the material is completely dissolved, add 2.25g of the initiator Sn(Oct) 2 , the reaction stopped after 12 hours. The reaction product was diluted with chloroform, precipitated with anhydrous methanol, filtered and dried to obtain a yellow solid crude product.

[0046] The cellulose acetate and polycaprolactone were mixed according to the mass ratio of 60 / 40 to obtain a resin mixture, and the CTW50 MiniLab conical twin-screw extrusion equipment of German HAAKE Company was used for melt extrusion of the blended material. At 130~250°C, put the resin mixture and the macromolecular compatibilizer into the silo of the twin-screw extrud...

Embodiment 2

[0048] Place strictly dried maleic anhydride 20 g and ε-caprolactone 90 g in a 250 ml three-necked flask, then depressurize and pass through N 2 , repeat the operation 3 times, stir under the protection of nitrogen, heat the oil bath to 130 ° C, until the material is completely dissolved, add 1.5g of initiator Sn(Oct) 2 , the reaction stopped after 16 hours. The reaction product was diluted with chloroform, precipitated with anhydrous methanol, filtered and dried to obtain a yellow solid crude product.

[0049] The cellulose acetate and polycaprolactone were mixed according to the mass ratio of 60 / 40 to obtain a resin mixture, and the CTW50 MiniLab conical twin-screw extrusion equipment of German HAAKE Company was used for melt extrusion of the blended material. At 130~250°C, put the resin mixture and the macromolecular compatibilizer into the silo of the twin-screw extruder, force feeding, and the extruded product is air-cooled and pelletized to form resin pellets.

Embodiment 3

[0051] Place strictly dried maleic anhydride 20 g and ε-caprolactone 90 g in a 250 ml three-necked flask, then depressurize and pass through N 2 , repeat the operation 3 times, stir under the protection of nitrogen, heat the oil bath to 130 ° C, until the material is completely dissolved, add 1.5g of the initiator Sn(Oct) 2 , the reaction stopped after 16 hours. The reaction product was diluted with chloroform, precipitated with anhydrous methanol, filtered, and dried to obtain a crude yellow solid polycaprolactone-maleic anhydride block copolymer.

[0052] The cellulose acetate and polycaprolactone were mixed in a mass ratio of 50 / 50 to obtain a resin mixture, and the CTW50 MiniLab conical twin-screw extrusion equipment of Germany HAAKE Company was used for melt extrusion of the blended material. At 130~250°C, put the resin mixture and compatibilizer into the silo of the twin-screw extruder, force feed, and the extruded product is air-cooled and pelletized to form resin pell...

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Abstract

The invention discloses a biodegradable polymer material compatibilized and blended by lignocellulose and a preparation method thereof. The biodegradable polymer material is composed of a resin mixture and a compatibilizer. The resin mixture is composed of resin and cellulose acetate or cellulose acetate propionate which is prepared from cellulose of poplar wood pulp. The resin is selected from any one of polycaprolactone, polylactic acid and polyhydroxybutyrate. The compatibilizer is a block copolymer of polycaprolactone-acid anhydride compound and the use amount of the compatibilizer is 2-30% of the total mass of the resin mixture. The preparation method provided by the invention comprises the following steps of: mixing celluosic resins to obtain the resin mixture; then compulsively feeding after adding the resin mixture and the compatibilizer into a feed bin of a double-screw extruder; cooling the extrudate by air and then dicing the extrudate into particles to obtain resin particles. The biodegradable polymer material and the preparation method provided by the invention have advantages of environmental friendliness, low cost, good combination property, stable product performance and higher promotion value.

Description

technical field [0001] The invention relates to a lignocellulose-degradable polymer material and a preparation method thereof, in particular to a lignocellulose-compatibilized, blended and degradable polymer material prepared by using a macromolecular compatibilizer and a preparation method thereof. Background technique [0002] In recent years, as countries all over the world pay more and more attention to environmental protection, biodegradable plastics have become the main subject of research in various countries. The development of biodegradable materials based on cellulose materials is of great significance to establishing ecological balance, protecting the environment, recycling economy, and saving resources. [0003] The research on degradable plastics in my country mainly focuses on the research on starch-filled biodegradable plastics, polylactic acid and photodegradable plastics, which are all synthetic degradable materials. Compared with it, cellulose materials h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/12C08L1/14C08L67/04B29B9/06
Inventor 金立维储富祥王春鹏张明明
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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